Improvement in hoisting-machines



J. I. BENHAM &'L. LEEDS.

Husum-MACHINES. No.'184,820. .Patented Nov. 28,1876.

im' MUNI ATTORNYS UETTEE STATES PATENT @EET JAMES I. BENHAM AND LODOWICKLEEDS, OF NEW LONDON, CONN.

IMPROVEMENT IN HOISTING-MACHINES.

Specification forming part of Letters Patent No. 184,820, dated November28, 1876; application led August 29, 1876.

- construction of a hoisting` apparatus, as llereinafter more fully setforth.

In the accompanying drawings, which form a part of this specification,Figure 1 repre-' sents a side elevation, and Fig. 2 an end view, of themachine.

A represents a metallic stirrup or frame, having a contracted portion,a, at the top for attaching a hook or other device to suspend themachine to a ceiling, beam, or other place. Between the lower ends otthe bars of the frame is journaled a shaft, y, and upon this shaft isplaced a wheel, E E', having a series of hooked notches, d d, on itsperiphery and a series ot smaller and similar notches, d d', on oneface, near the periphery. G represents a pulley, also mounted on theshaft y and rotated with the wheel. This pulley is provided withsuitable notches or devices to prevent the chain H, which passes aroundthe same, from slipping. B represents a metallic head, which is pivotedor journaled, at av, between the bars of the frame A, `just below thecontracted portion a. Each end of this head is socketed, as seen at C C,Fig. l, and into said sockets are inserted operating handles or levers bb. These levers are easily detachable from the head, for replacing themin case of breakage, or for any purpose. Connected to the head are twopivoted bails or hooks, C D, one on each side of the pivot X, and bothextending down to and on the' same side of the wheel E, for engaging inthe notches of the same. On a shaft, between the point av and the topofthe wheel E, are pivoted two gravitating pawls, ff. These pawls dropinto the notches d d', respectively, of the wheel on the side oppositeto the bails C D.

The operation ot' the machine is simple.

lThe frame being suspended, and the chain H being passed around thepulley G, the chain is attached to anything to be hoisted. rIhe levers bb are raised and lowered alternately, so that the bails C D will catch,one after the other, in the notches d of the wheel, while the pa-wls f fdrop, one after the other, in the notches del' in the sameon the otherside. This action will cause the wheel to have a continuous rotatingmotion, and thus raise the chain by the revolving of the pulley G withthe wheel. The two pawls will prevent any backward movement, inasmuch asone is always in a notch of the wheel.

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

The combination of the frame A, the wheel E, with hooked notches d, thewheel E', of smaller diameter, on the face ot the wheel E, and havinghooked notches d formed of the same shape and extending in circular formthe same direction as the notches d, the gravitating pawls ffpivoted tothe stirrup A, the pivoted head B, having handles b b, and the bails orhooks C D pivoted to the head B, all oonstructed substantially as andfor the purposes herein set forth.

In testimony that we claim the foregoing we have hereunto set our handsthis 22d day of August, 1876.

JAMES 1. BEN HAM. LODOWICK LEEDS. Witnesses:

BENJ. M. CARROLL, HENRY PHILLIPS.

